Now ex-"Black Ink Crew" star Ceaser Emanuel is being investigated by animal services and local law enforcement after the video of him allegedly abusing dogs picked up traction online.

A rep for Fulton County Animal Services tells TMZ ...

Ceasar's rep tells us the Fulton County police have already questioned Ceasar, and the rep claims cops found nothing wrong and that his dogs are safe, healthy and show no signs of abuse.

Further, Ceaser's team claims it was an ex-girlfriend who reported him to cops, and leaked his surveillance video online ...